我正在尝试将图像发送回whatsapp，类似于将图像返回给whatsapp
我使用了链接中给出的解决方案，但我在该行中得到了一个空指针异常
((Activity) context).setResult(Activity.RESULT_OK, shareIntent);
我将在这里发布我的完整代码：-
公共类 Lst1Fragment 扩展片段{
GridView gridView1;
public static boolean isinint = false;
Context context;
File openprev;
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.fragment_xml_title, container, false);
createListView(view);
// Inflate the layout for this fragment
return view;
}
private void createListView(View view)
{
gridView1 = (GridView) view.findViewById(R.id.gridView1);
//Set option as Multiple Choice. So that user can able to select more the one option from list
gridView1.setAdapter(new ImageAdapter(getActivity()));
gridView1.setOnItemClickListener(new OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> view, View arg1, int pos,
long arg3) {
Uri path = Uri.parse("android.resource://"
+ getActivity().getPackageName() + "/"
+ R.drawable.action);
Intent startUpIntent = getActivity().getIntent();
if (startUpIntent!=null && startUpIntent.getType()!=null) //check if any application has executed your app
{
if(startUpIntent.getType().indexOf("image/") != -1)
isinint=true; //check if the requested type is an image. If true, set a public static boolean, f.e. named isinint to true. Default is false.
}
if(isinint) //check if any app cares for the result
{
Intent shareIntent = new Intent(android.content.Intent.ACTION_SEND, path);
//Uri.fromFile(openprev));
//Create a new intent. First parameter means that you want to send the file.
//The second parameter is the URI pointing to a file on the sd card. (openprev has the datatype File)
((Activity) context).setResult(Activity.RESULT_OK, shareIntent); //set the file/intent as result
((Activity) context).finish(); //close your application and get back to the requesting application like GMail and WhatsApp
return; //do not execute code below, not important
}
}
});
}
public class ImageAdapter extends BaseAdapter {
private Context mContext;
// Keep all Images in array
public Integer[] mThumbIds = {
R.drawable.action, R.drawable.comedy,
R.drawable.drama, R.drawable.horror
};
// Constructor
public ImageAdapter(Context c){
mContext = c;
}
@Override
public int getCount() {
return mThumbIds.length;
}
@Override
public Object getItem(int position) {
return mThumbIds[position];
}
@Override
public long getItemId(int position) {
return 0;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
ImageView imageView = new ImageView(mContext);
imageView.setImageResource(mThumbIds[position]);
imageView.setScaleType(ImageView.ScaleType.CENTER_INSIDE);
return imageView;
}
}
}
我的完整堆栈跟踪：-
10-25 09:53:56.605: W/dalvikvm(2913): threadid=1: thread exiting with uncaught exception (group=0x2aacc560)
10-25 09:53:56.605: E/AndroidRuntime(2913): Uncaught handler: thread main exiting due to uncaught exception
10-25 09:53:56.615: W/System.err(2913): java.io.IOException: Permission denied
10-25 09:53:56.625: E/AndroidRuntime(2913): FATAL EXCEPTION: main
10-25 09:53:56.625: E/AndroidRuntime(2913): java.lang.NullPointerException
10-25 09:53:56.625: E/AndroidRuntime(2913): at com.example.myfragments.Lst1Fragment$1.onItemClick(Lst1Fragment.java:68)
10-25 09:53:56.625: E/AndroidRuntime(2913): at android.widget.AdapterView.performItemClick(AdapterView.java:284)
10-25 09:53:56.625: E/AndroidRuntime(2913): at android.widget.AbsListView$PerformClick.run(AbsListView.java:1812)
10-25 09:53:56.625: E/AndroidRuntime(2913): at android.os.Handler.handleCallback(Handler.java:587)
10-25 09:53:56.625: E/AndroidRuntime(2913): at android.os.Handler.dispatchMessage(Handler.java:92)
10-25 09:53:56.625: E/AndroidRuntime(2913): at android.os.Looper.loop(Looper.java:130)
10-25 09:53:56.625: E/AndroidRuntime(2913): at android.app.ActivityThread.main(ActivityThread.java:3683)
10-25 09:53:56.625: E/AndroidRuntime(2913): at java.lang.reflect.Method.invokeNative(Native Method)
10-25 09:53:56.625: E/AndroidRuntime(2913): at java.lang.reflect.Method.invoke(Method.java:507)
10-25 09:53:56.625: E/AndroidRuntime(2913): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:895)
10-25 09:53:56.625: E/AndroidRuntime(2913): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:653)
10-25 09:53:56.625: E/AndroidRuntime(2913): at dalvik.system.NativeStart.main(Native Method)
10-25 09:53:56.645: W/System.err(2913): java.io.FileNotFoundException: /data/plog.log (Permission denied)